24 files changed, 337 insertions, 141 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 0f98bbddade5..ed5cb5af5281 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -274,11 +274,11 @@ config MARCH_Z10
           on older machines.
 
 config MARCH_Z196
-        bool "IBM zEnterprise 196"
+        bool "IBM zEnterprise 114 and 196"
         help
-          Select this to enable optimizations for IBM zEnterprise 196
-          (2817 series). The kernel will be slightly faster but will not work
-          on older machines.
+          Select this to enable optimizations for IBM zEnterprise 114 and 196
+          (2818 and 2817 series). The kernel will be slightly faster but will
+          not work on older machines.
 
 endchoice
 
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
index 5e95d95450b3..97cc4403fabf 100644
--- a/arch/s390/include/asm/ipl.h
+++ b/arch/s390/include/asm/ipl.h
@@ -167,5 +167,6 @@ enum diag308_rc {
 };
 
 extern int diag308(unsigned long subcode, void *addr);
+extern void diag308_reset(void);
 
 #endif /* _ASM_S390_IPL_H */
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index f26280d9e88d..e85c911aabf0 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -18,6 +18,7 @@ void system_call(void);
 void pgm_check_handler(void);
 void mcck_int_handler(void);
 void io_int_handler(void);
+void psw_restart_int_handler(void);
 
 #ifdef CONFIG_32BIT
 
@@ -150,7 +151,10 @@ struct _lowcore {
          */
         __u32   ipib;                           /* 0x0e00 */
         __u32   ipib_checksum;                  /* 0x0e04 */
-        __u8    pad_0x0e08[0x0f00-0x0e08];      /* 0x0e08 */
+
+        /* 64 bit save area */
+        __u64   save_area_64;                   /* 0x0e08 */
+        __u8    pad_0x0e10[0x0f00-0x0e10];      /* 0x0e10 */
 
         /* Extended facility list */
         __u64   stfle_fac_list[32];             /* 0x0f00 */
@@ -286,7 +290,10 @@ struct _lowcore {
          */
         __u64   ipib;                           /* 0x0e00 */
         __u32   ipib_checksum;                  /* 0x0e08 */
-        __u8    pad_0x0e0c[0x0f00-0x0e0c];      /* 0x0e0c */
+
+        /* 64 bit save area */
+        __u64   save_area_64;                   /* 0x0e0c */
+        __u8    pad_0x0e14[0x0f00-0x0e14];      /* 0x0e14 */
 
         /* Extended facility list */
         __u64   stfle_fac_list[32];             /* 0x0f00 */
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 55dfcc8bdc0d..a4b6229e5d4b 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -119,14 +119,12 @@ struct stack_frame {
  * Do necessary setup to start up a new thread.
  */
 #define start_thread(regs, new_psw, new_stackp) do {            \
-        set_fs(USER_DS);                                        \
         regs->psw.mask  = psw_user_bits;                        \
         regs->psw.addr  = new_psw | PSW_ADDR_AMODE;             \
         regs->gprs[15]  = new_stackp;                           \
 } while (0)
 
 #define start_thread31(regs, new_psw, new_stackp) do {          \
-        set_fs(USER_DS);                                        \
         regs->psw.mask  = psw_user32_bits;                      \
         regs->psw.addr  = new_psw | PSW_ADDR_AMODE;             \
         regs->gprs[15]  = new_stackp;                           \
diff --git a/arch/s390/include/asm/system.h b/arch/s390/include/asm/system.h
index d382629a0172..6582f69f2389 100644
--- a/arch/s390/include/asm/system.h
+++ b/arch/s390/include/asm/system.h
@@ -113,6 +113,7 @@ extern void pfault_fini(void);
 
 extern void cmma_init(void);
 extern int memcpy_real(void *, void *, size_t);
+extern void copy_to_absolute_zero(void *dest, void *src, size_t count);
 
 #define finish_arch_switch(prev) do {                                        \
         set_fs(current->thread.mm_segment);                                  \
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index 05d8f38734ec..532fd4322156 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -27,12 +27,9 @@ int main(void)
         BLANK();
         DEFINE(__TASK_pid, offsetof(struct task_struct, pid));
         BLANK();
-        DEFINE(__THREAD_per_cause,
-               offsetof(struct task_struct, thread.per_event.cause));
-        DEFINE(__THREAD_per_address,
-               offsetof(struct task_struct, thread.per_event.address));
-        DEFINE(__THREAD_per_paid,
-               offsetof(struct task_struct, thread.per_event.paid));
+        DEFINE(__THREAD_per_cause, offsetof(struct task_struct, thread.per_event.cause));
+        DEFINE(__THREAD_per_address, offsetof(struct task_struct, thread.per_event.address));
+        DEFINE(__THREAD_per_paid, offsetof(struct task_struct, thread.per_event.paid));
         BLANK();
         DEFINE(__TI_task, offsetof(struct thread_info, task));
         DEFINE(__TI_domain, offsetof(struct thread_info, exec_domain));
@@ -142,6 +139,7 @@ int main(void)
         DEFINE(__LC_FPREGS_SAVE_AREA, offsetof(struct _lowcore, floating_pt_save_area));
         DEFINE(__LC_GPREGS_SAVE_AREA, offsetof(struct _lowcore, gpregs_save_area));
         DEFINE(__LC_CREGS_SAVE_AREA, offsetof(struct _lowcore, cregs_save_area));
+        DEFINE(__LC_SAVE_AREA_64, offsetof(struct _lowcore, save_area_64));
 #ifdef CONFIG_32BIT
         DEFINE(SAVE_AREA_BASE, offsetof(struct _lowcore, extended_save_area_addr));
 #else /* CONFIG_32BIT */
diff --git a/arch/s390/kernel/base.S b/arch/s390/kernel/base.S
index 209938c1dfc8..255435663bf8 100644
--- a/arch/s390/kernel/base.S
+++ b/arch/s390/kernel/base.S
@@ -76,6 +76,42 @@ s390_base_pgm_handler_fn:
         .quad   0
         .previous
 
+#
+# Calls diag 308 subcode 1 and continues execution
+#
+# The following conditions must be ensured before calling this function:
+# * Prefix register = 0
+# * Lowcore protection is disabled
+#
+ENTRY(diag308_reset)
+        larl    %r4,.Lctlregs           # Save control registers
+        stctg   %c0,%c15,0(%r4)
+        larl    %r4,.Lrestart_psw       # Setup restart PSW at absolute 0
+        lghi    %r3,0
+        lg      %r4,0(%r4)              # Save PSW
+        sturg   %r4,%r3                 # Use sturg, because of large pages
+        lghi    %r1,1
+        diag    %r1,%r1,0x308
+.Lrestart_part2:
+        lhi     %r0,0                   # Load r0 with zero
+        lhi     %r1,2                   # Use mode 2 = ESAME (dump)
+        sigp    %r1,%r0,0x12            # Switch to ESAME mode
+        sam64                           # Switch to 64 bit addressing mode
+        larl    %r4,.Lctlregs           # Restore control registers
+        lctlg   %c0,%c15,0(%r4)
+        br      %r14
+.align 16
+.Lrestart_psw:
+        .long   0x00080000,0x80000000 + .Lrestart_part2
+
+        .section .bss
+.align 8
+.Lctlregs:
+        .rept   16
+        .quad   0
+        .endr
+        .previous
+
 #else /* CONFIG_64BIT */
 
 ENTRY(s390_base_mcck_handler)
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index eee999853a7c..a9a285b8c4ad 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -380,20 +380,13 @@ asmlinkage long sys32_sigreturn(void)
                 goto badframe;
         if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32))
                 goto badframe;
-
         sigdelsetmask(&set, ~_BLOCKABLE);
-        spin_lock_irq(&current->sighand->siglock);
-        current->blocked = set;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-
+        set_current_blocked(&set);
         if (restore_sigregs32(regs, &frame->sregs))
                 goto badframe;
         if (restore_sigregs_gprs_high(regs, frame->gprs_high))
                 goto badframe;
-
         return regs->gprs[2];
-
 badframe:
         force_sig(SIGSEGV, current);
         return 0;
@@ -413,31 +406,22 @@ asmlinkage long sys32_rt_sigreturn(void)
                 goto badframe;
         if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
                 goto badframe;
-
         sigdelsetmask(&set, ~_BLOCKABLE);
-        spin_lock_irq(&current->sighand->siglock);
-        current->blocked = set;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-
+        set_current_blocked(&set);
         if (restore_sigregs32(regs, &frame->uc.uc_mcontext))
                 goto badframe;
         if (restore_sigregs_gprs_high(regs, frame->gprs_high))
                 goto badframe;
-
         err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp);
         st.ss_sp = compat_ptr(ss_sp);
         err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size);
         err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags);
         if (err)
                 goto badframe; 
-
         set_fs (KERNEL_DS);
         do_sigaltstack((stack_t __force __user *)&st, NULL, regs->gprs[15]);
         set_fs (old_fs);
-
         return regs->gprs[2];
-
 badframe:
         force_sig(SIGSEGV, current);
         return 0;
@@ -605,10 +589,10 @@ give_sigsegv:
  * OK, we're invoking a handler
  */     
 
-int
-handle_signal32(unsigned long sig, struct k_sigaction *ka,
-                siginfo_t *info, sigset_t *oldset, struct pt_regs * regs)
+int handle_signal32(unsigned long sig, struct k_sigaction *ka,
+                    siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
 {
+        sigset_t blocked;
         int ret;
 
         /* Set up the stack frame */
@@ -616,15 +600,12 @@ handle_signal32(unsigned long sig, struct k_sigaction *ka,
                 ret = setup_rt_frame32(sig, ka, info, oldset, regs);
         else
                 ret = setup_frame32(sig, ka, oldset, regs);
-
-        if (ret == 0) {
-                spin_lock_irq(&current->sighand->siglock);
-                sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
-                if (!(ka->sa.sa_flags & SA_NODEFER))
-                        sigaddset(&current->blocked,sig);
-                recalc_sigpending();
-                spin_unlock_irq(&current->sighand->siglock);
-        }
-        return ret;
+        if (ret)
+                return ret;
+        sigorsets(&blocked, &current->blocked, &ka->sa.sa_mask);
+        if (!(ka->sa.sa_flags & SA_NODEFER))
+                sigaddset(&blocked, sig);
+        set_current_blocked(&blocked);
+        return 0;
 }
 
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 3eab7cfab07c..02ec8fe7d03f 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -849,6 +849,34 @@ restart_crash:
 restart_go:
 #endif
 
+#
+# PSW restart interrupt handler
+#
+ENTRY(psw_restart_int_handler)
+        st      %r15,__LC_SAVE_AREA_64(%r0)     # save r15
+        basr    %r15,0
+0:      l       %r15,.Lrestart_stack-0b(%r15)   # load restart stack
+        l       %r15,0(%r15)
+        ahi     %r15,-SP_SIZE                   # make room for pt_regs
+        stm     %r0,%r14,SP_R0(%r15)            # store gprs %r0-%r14 to stack
+        mvc     SP_R15(4,%r15),__LC_SAVE_AREA_64(%r0)# store saved %r15 to stack
+        mvc     SP_PSW(8,%r15),__LC_RST_OLD_PSW(%r0) # store restart old psw
+        xc      __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # set backchain to 0
+        basr    %r14,0
+1:      l       %r14,.Ldo_restart-1b(%r14)
+        basr    %r14,%r14
+
+        basr    %r14,0                          # load disabled wait PSW if
+2:      lpsw    restart_psw_crash-2b(%r14)      # do_restart returns
+        .align 4
+.Ldo_restart:
+        .long   do_restart
+.Lrestart_stack:
+        .long   restart_stack
+        .align 8
+restart_psw_crash:
+        .long   0x000a0000,0x00000000 + restart_psw_crash
+
         .section .kprobes.text, "ax"
 
 #ifdef CONFIG_CHECK_STACK
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 7a0fd426ca92..5f729d627cef 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -865,6 +865,26 @@ restart_crash:
 restart_go:
 #endif
 
+#
+# PSW restart interrupt handler
+#
+ENTRY(psw_restart_int_handler)
+        stg     %r15,__LC_SAVE_AREA_64(%r0)     # save r15
+        larl    %r15,restart_stack              # load restart stack
+        lg      %r15,0(%r15)
+        aghi    %r15,-SP_SIZE                   # make room for pt_regs
+        stmg    %r0,%r14,SP_R0(%r15)            # store gprs %r0-%r14 to stack
+        mvc     SP_R15(8,%r15),__LC_SAVE_AREA_64(%r0)# store saved %r15 to stack
+        mvc     SP_PSW(16,%r15),__LC_RST_OLD_PSW(%r0)# store restart old psw
+        xc      __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) # set backchain to 0
+        brasl   %r14,do_restart
+
+        larl    %r14,restart_psw_crash          # load disabled wait PSW if
+        lpswe   0(%r14)                         # do_restart returns
+        .align 8
+restart_psw_crash:
+        .quad   0x0002000080000000,0x0000000000000000 + restart_psw_crash
+
         .section .kprobes.text, "ax"
 
 #ifdef CONFIG_CHECK_STACK
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index a689070be287..04361d5a4279 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -45,11 +45,13 @@
  * - halt
  * - power off
  * - reipl
+ * - restart
  */
 #define ON_PANIC_STR            "on_panic"
 #define ON_HALT_STR             "on_halt"
 #define ON_POFF_STR             "on_poff"
 #define ON_REIPL_STR            "on_reboot"
+#define ON_RESTART_STR          "on_restart"
 
 struct shutdown_action;
 struct shutdown_trigger {
@@ -1544,17 +1546,20 @@ static char vmcmd_on_reboot[128];
 static char vmcmd_on_panic[128];
 static char vmcmd_on_halt[128];
 static char vmcmd_on_poff[128];
+static char vmcmd_on_restart[128];
 
 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
+DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
 
 static struct attribute *vmcmd_attrs[] = {
         &sys_vmcmd_on_reboot_attr.attr,
         &sys_vmcmd_on_panic_attr.attr,
         &sys_vmcmd_on_halt_attr.attr,
         &sys_vmcmd_on_poff_attr.attr,
+        &sys_vmcmd_on_restart_attr.attr,
         NULL,
 };
 
@@ -1576,6 +1581,8 @@ static void vmcmd_run(struct shutdown_trigger *trigger)
                 cmd = vmcmd_on_halt;
         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
                 cmd = vmcmd_on_poff;
+        else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
+                cmd = vmcmd_on_restart;
         else
                 return;
 
@@ -1707,6 +1714,34 @@ static void do_panic(void)
         stop_run(&on_panic_trigger);
 }
 
+/* on restart */
+
+static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
+        &reipl_action};
+
+static ssize_t on_restart_show(struct kobject *kobj,
+                               struct kobj_attribute *attr, char *page)
+{
+        return sprintf(page, "%s\n", on_restart_trigger.action->name);
+}
+
+static ssize_t on_restart_store(struct kobject *kobj,
+                                struct kobj_attribute *attr,
+                                const char *buf, size_t len)
+{
+        return set_trigger(buf, &on_restart_trigger, len);
+}
+
+static struct kobj_attribute on_restart_attr =
+        __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
+
+void do_restart(void)
+{
+        smp_send_stop();
+        on_restart_trigger.action->fn(&on_restart_trigger);
+        stop_run(&on_restart_trigger);
+}
+
 /* on halt */
 
 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
@@ -1783,7 +1818,9 @@ static void __init shutdown_triggers_init(void)
         if (sysfs_create_file(&shutdown_actions_kset->kobj,
                               &on_poff_attr.attr))
                 goto fail;
-
+        if (sysfs_create_file(&shutdown_actions_kset->kobj,
+                              &on_restart_attr.attr))
+                goto fail;
         return;
 fail:
         panic("shutdown_triggers_init failed\n");
@@ -1959,6 +1996,12 @@ static void do_reset_calls(void)
 {
         struct reset_call *reset;
 
+#ifdef CONFIG_64BIT
+        if (diag308_set_works) {
+                diag308_reset();
+                return;
+        }
+#endif
         list_for_each_entry(reset, &rcall, list)
                 reset->fn();
 }
diff --git a/arch/s390/kernel/reipl64.S b/arch/s390/kernel/reipl64.S
index 78eb7cfbd3d1..e690975403f4 100644
--- a/arch/s390/kernel/reipl64.S
+++ b/arch/s390/kernel/reipl64.S
@@ -1,5 +1,5 @@
 /*
- *    Copyright IBM Corp 2000,2009
+ *    Copyright IBM Corp 2000,2011
  *    Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
  *               Denis Joseph Barrow,
  */
@@ -8,6 +8,64 @@
 #include <asm/asm-offsets.h>
 
 #
+# store_status
+#
+# Prerequisites to run this function:
+# - Prefix register is set to zero
+# - Original prefix register is stored in "dump_prefix_page"
+# - Lowcore protection is off
+#
+ENTRY(store_status)
+        /* Save register one and load save area base */
+        stg     %r1,__LC_SAVE_AREA_64(%r0)
+        lghi    %r1,SAVE_AREA_BASE
+        /* General purpose registers */
+        stmg    %r0,%r15,__LC_GPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        lg      %r2,__LC_SAVE_AREA_64(%r0)
+        stg     %r2,__LC_GPREGS_SAVE_AREA-SAVE_AREA_BASE+8(%r1)
+        /* Control registers */
+        stctg   %c0,%c15,__LC_CREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        /* Access registers */
+        stam    %a0,%a15,__LC_AREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        /* Floating point registers */
+        std     %f0, 0x00 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f1, 0x08 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f2, 0x10 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f3, 0x18 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f4, 0x20 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f5, 0x28 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f6, 0x30 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f7, 0x38 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f8, 0x40 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f9, 0x48 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f10,0x50 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f11,0x58 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f12,0x60 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f13,0x68 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f14,0x70 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        std     %f15,0x78 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        /* Floating point control register */
+        stfpc   __LC_FP_CREG_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        /* CPU timer */
+        stpt    __LC_CPU_TIMER_SAVE_AREA-SAVE_AREA_BASE(%r1)
+        /* Saved prefix register */
+        larl    %r2,dump_prefix_page
+        mvc     __LC_PREFIX_SAVE_AREA-SAVE_AREA_BASE(4,%r1),0(%r2)
+        /* Clock comparator - seven bytes */
+        larl    %r2,.Lclkcmp
+        stckc   0(%r2)
+        mvc     __LC_CLOCK_COMP_SAVE_AREA-SAVE_AREA_BASE + 1(7,%r1),1(%r2)
+        /* Program status word */
+        epsw    %r2,%r3
+        st      %r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 0(%r1)
+        st      %r3,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 4(%r1)
+        larl    %r2,store_status
+        stg     %r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 8(%r1)
+        br      %r14
+.align  8
+.Lclkcmp:       .quad   0x0000000000000000
+
+#
 # do_reipl_asm
 # Parameter: r2 = schid of reipl device
 #
@@ -15,22 +73,7 @@
 ENTRY(do_reipl_asm)
                 basr    %r13,0
 .Lpg0:          lpswe   .Lnewpsw-.Lpg0(%r13)
-.Lpg1:          # do store status of all registers
-
-                stg     %r1,.Lregsave-.Lpg0(%r13)
-                lghi    %r1,0x1000
-                stmg    %r0,%r15,__LC_GPREGS_SAVE_AREA-0x1000(%r1)
-                lg      %r0,.Lregsave-.Lpg0(%r13)
-                stg     %r0,__LC_GPREGS_SAVE_AREA-0x1000+8(%r1)
-                stctg   %c0,%c15,__LC_CREGS_SAVE_AREA-0x1000(%r1)
-                stam    %a0,%a15,__LC_AREGS_SAVE_AREA-0x1000(%r1)
-                lg      %r10,.Ldump_pfx-.Lpg0(%r13)
-                mvc     __LC_PREFIX_SAVE_AREA-0x1000(4,%r1),0(%r10)
-                stfpc   __LC_FP_CREG_SAVE_AREA-0x1000(%r1)
-                stckc   .Lclkcmp-.Lpg0(%r13)
-                mvc     __LC_CLOCK_COMP_SAVE_AREA-0x1000(7,%r1),.Lclkcmp-.Lpg0(%r13)
-                stpt    __LC_CPU_TIMER_SAVE_AREA-0x1000(%r1)
-                stg     %r13, __LC_PSW_SAVE_AREA-0x1000+8(%r1)
+.Lpg1:          brasl   %r14,store_status
 
                 lctlg   %c6,%c6,.Lall-.Lpg0(%r13)
                 lgr     %r1,%r2
@@ -67,10 +110,7 @@ ENTRY(do_reipl_asm)
                 st      %r14,.Ldispsw+12-.Lpg0(%r13)
                 lpswe   .Ldispsw-.Lpg0(%r13)
                 .align  8
-.Lclkcmp:       .quad   0x0000000000000000
 .Lall:          .quad   0x00000000ff000000
-.Ldump_pfx:     .quad   dump_prefix_page
-.Lregsave:      .quad   0x0000000000000000
                 .align  16
 /*
  * These addresses have to be 31 bit otherwise
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 0c35dee10b00..7b371c37061d 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -346,7 +346,7 @@ setup_lowcore(void)
         lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0);
         lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
         lc->restart_psw.addr =
-                PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
+                PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler;
         if (user_mode != HOME_SPACE_MODE)
                 lc->restart_psw.mask |= PSW_ASC_HOME;
         lc->external_new_psw.mask = psw_kernel_bits;
@@ -529,6 +529,27 @@ static void __init setup_memory_end(void)
                 memory_end = memory_size;
 }
 
+void *restart_stack __attribute__((__section__(".data")));
+
+/*
+ * Setup new PSW and allocate stack for PSW restart interrupt
+ */
+static void __init setup_restart_psw(void)
+{
+        psw_t psw;
+
+        restart_stack = __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0);
+        restart_stack += ASYNC_SIZE;
+
+        /*
+         * Setup restart PSW for absolute zero lowcore. This is necesary
+         * if PSW restart is done on an offline CPU that has lowcore zero
+         */
+        psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
+        psw.addr = PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler;
+        copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw));
+}
+
 static void __init
 setup_memory(void)
 {
@@ -731,6 +752,7 @@ static void __init setup_hwcaps(void)
                 strcpy(elf_platform, "z10");
                 break;
         case 0x2817:
+        case 0x2818:
                 strcpy(elf_platform, "z196");
                 break;
         }
@@ -792,6 +814,7 @@ setup_arch(char **cmdline_p)
         setup_addressing_mode();
         setup_memory();
         setup_resources();
+        setup_restart_psw();
         setup_lowcore();
 
         cpu_init();
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index abbb3c3c7aab..9a40e1cc5ec3 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -57,17 +57,15 @@ typedef struct
  */
 SYSCALL_DEFINE3(sigsuspend, int, history0, int, history1, old_sigset_t, mask)
 {
-        mask &= _BLOCKABLE;
-        spin_lock_irq(&current->sighand->siglock);
-        current->saved_sigmask = current->blocked;
-        siginitset(&current->blocked, mask);
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
+        sigset_t blocked;
 
+        current->saved_sigmask = current->blocked;
+        mask &= _BLOCKABLE;
+        siginitset(&blocked, mask);
+        set_current_blocked(&blocked);
         set_current_state(TASK_INTERRUPTIBLE);
         schedule();
-        set_thread_flag(TIF_RESTORE_SIGMASK);
-
+        set_restore_sigmask();
         return -ERESTARTNOHAND;
 }
 
@@ -172,18 +170,11 @@ SYSCALL_DEFINE0(sigreturn)
                 goto badframe;
         if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE))
                 goto badframe;
-
         sigdelsetmask(&set, ~_BLOCKABLE);
-        spin_lock_irq(&current->sighand->siglock);
-        current->blocked = set;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-
+        set_current_blocked(&set);
         if (restore_sigregs(regs, &frame->sregs))
                 goto badframe;
-
         return regs->gprs[2];
-
 badframe:
         force_sig(SIGSEGV, current);
         return 0;
@@ -199,21 +190,14 @@ SYSCALL_DEFINE0(rt_sigreturn)
                 goto badframe;
         if (__copy_from_user(&set.sig, &frame->uc.uc_sigmask, sizeof(set)))
                 goto badframe;
-
         sigdelsetmask(&set, ~_BLOCKABLE);
-        spin_lock_irq(&current->sighand->siglock);
-        current->blocked = set;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-
+        set_current_blocked(&set);
         if (restore_sigregs(regs, &frame->uc.uc_mcontext))
                 goto badframe;
-
         if (do_sigaltstack(&frame->uc.uc_stack, NULL,
                            regs->gprs[15]) == -EFAULT)
                 goto badframe;
         return regs->gprs[2];
-
 badframe:
         force_sig(SIGSEGV, current);
         return 0;
@@ -385,14 +369,11 @@ give_sigsegv:
         return -EFAULT;
 }
 
-/*
- * OK, we're invoking a handler
- */     
-
-static int
-handle_signal(unsigned long sig, struct k_sigaction *ka,
-              siginfo_t *info, sigset_t *oldset, struct pt_regs * regs)
+static int handle_signal(unsigned long sig, struct k_sigaction *ka,
+                         siginfo_t *info, sigset_t *oldset,
+                         struct pt_regs *regs)
 {
+        sigset_t blocked;
         int ret;
 
         /* Set up the stack frame */
@@ -400,17 +381,13 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
                 ret = setup_rt_frame(sig, ka, info, oldset, regs);
         else
                 ret = setup_frame(sig, ka, oldset, regs);
-
-        if (ret == 0) {
-                spin_lock_irq(&current->sighand->siglock);
-                sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
-                if (!(ka->sa.sa_flags & SA_NODEFER))
-                        sigaddset(&current->blocked,sig);
-                recalc_sigpending();
-                spin_unlock_irq(&current->sighand->siglock);
-        }
-
-        return ret;
+        if (ret)
+                return ret;
+        sigorsets(&blocked, &current->blocked, &ka->sa.sa_mask);
+        if (!(ka->sa.sa_flags & SA_NODEFER))
+                sigaddset(&blocked, sig);
+        set_current_blocked(&blocked);
+        return 0;
 }
 
 /*
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index a6d85c0a7f20..6ab16ac64d29 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -452,23 +452,27 @@ out:
  */
 int __cpuinit start_secondary(void *cpuvoid)
 {
-        /* Setup the cpu */
         cpu_init();
         preempt_disable();
-        /* Enable TOD clock interrupts on the secondary cpu. */
         init_cpu_timer();
-        /* Enable cpu timer interrupts on the secondary cpu. */
         init_cpu_vtimer();
-        /* Enable pfault pseudo page faults on this cpu. */
         pfault_init();
 
-        /* call cpu notifiers */
         notify_cpu_starting(smp_processor_id());
-        /* Mark this cpu as online */
         ipi_call_lock();
         set_cpu_online(smp_processor_id(), true);
         ipi_call_unlock();
-        /* Switch on interrupts */
+        __ctl_clear_bit(0, 28); /* Disable lowcore protection */
+        S390_lowcore.restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
+        S390_lowcore.restart_psw.addr =
+                PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler;
+        __ctl_set_bit(0, 28); /* Enable lowcore protection */
+        /*
+         * Wait until the cpu which brought this one up marked it
+         * active before enabling interrupts.
+         */
+        while (!cpumask_test_cpu(smp_processor_id(), cpu_active_mask))
+                cpu_relax();
         local_irq_enable();
         /* cpu_idle will call schedule for us */
         cpu_idle();
@@ -507,7 +511,11 @@ static int __cpuinit smp_alloc_lowcore(int cpu)
         memset((char *)lowcore + 512, 0, sizeof(*lowcore) - 512);
         lowcore->async_stack = async_stack + ASYNC_SIZE;
         lowcore->panic_stack = panic_stack + PAGE_SIZE;
-
+        lowcore->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
+        lowcore->restart_psw.addr =
+                PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
+        if (user_mode != HOME_SPACE_MODE)
+                lowcore->restart_psw.mask |= PSW_ASC_HOME;
 #ifndef CONFIG_64BIT
         if (MACHINE_HAS_IEEE) {
                 unsigned long save_area;
diff --git a/arch/s390/mm/maccess.c b/arch/s390/mm/maccess.c
index 51e5cd9b906a..5dbbaa6e594c 100644
--- a/arch/s390/mm/maccess.c
+++ b/arch/s390/mm/maccess.c
@@ -85,3 +85,19 @@ int memcpy_real(void *dest, void *src, size_t count)
         arch_local_irq_restore(flags);
         return rc;
 }
+
+/*
+ * Copy memory to absolute zero
+ */
+void copy_to_absolute_zero(void *dest, void *src, size_t count)
+{
+        unsigned long cr0;
+
+        BUG_ON((unsigned long) dest + count >= sizeof(struct _lowcore));
+        preempt_disable();
+        __ctl_store(cr0, 0, 0);
+        __ctl_clear_bit(0, 28); /* disable lowcore protection */
+        memcpy_real(dest + store_prefix(), src, count);
+        __ctl_load(cr0, 0, 0);
+        preempt_enable();
+}
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 2adb23938a7f..4d1f2bce87b3 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -528,6 +528,7 @@ static inline void page_table_free_pgste(unsigned long *table)
 static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm,
                                                     unsigned long vmaddr)
 {
+        return NULL;
 }
 
 static inline void page_table_free_pgste(unsigned long *table)
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 432444af7ee4..a1d3ddba99cc 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -24,6 +24,7 @@
 #include <linux/mutex.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
+#include <linux/vmalloc.h>
 
 #include <asm/ccwdev.h>
 #include <asm/ebcdic.h>
@@ -888,11 +889,11 @@ char *dasd_get_user_string(const char __user *user_buf, size_t user_len)
 {
         char *buffer;
 
-        buffer = kmalloc(user_len + 1, GFP_KERNEL);
+        buffer = vmalloc(user_len + 1);
         if (buffer == NULL)
                 return ERR_PTR(-ENOMEM);
         if (copy_from_user(buffer, user_buf, user_len) != 0) {
-                kfree(buffer);
+                vfree(buffer);
                 return ERR_PTR(-EFAULT);
         }
         /* got the string, now strip linefeed. */
@@ -930,7 +931,7 @@ static ssize_t dasd_stats_write(struct file *file,
                 dasd_profile_off(prof);
         } else
                 rc = -EINVAL;
-        kfree(buffer);
+        vfree(buffer);
         return rc;
 }
 
@@ -1042,7 +1043,7 @@ static ssize_t dasd_stats_global_write(struct file *file,
                 dasd_global_profile_level = DASD_PROFILE_OFF;
         } else
                 rc = -EINVAL;
-        kfree(buffer);
+        vfree(buffer);
         return rc;
 }
 
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 30fb979d684d..6e835c9fdfcb 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1461,6 +1461,15 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
                                 "Read device characteristic failed, rc=%d", rc);
                 goto out_err3;
         }
+
+        if ((device->features & DASD_FEATURE_USERAW) &&
+            !(private->rdc_data.facilities.RT_in_LR)) {
+                dev_err(&device->cdev->dev, "The storage server does not "
+                        "support raw-track access\n");
+                rc = -EINVAL;
+                goto out_err3;
+        }
+
         /* find the valid cylinder size */
         if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
             private->rdc_data.long_no_cyl)
diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index 6c3c5364d082..e12989fff4ff 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -312,14 +312,14 @@ static ssize_t dasd_stats_proc_write(struct file *file,
                 pr_info("The statistics have been reset\n");
         } else
                 goto out_parse_error;
-        kfree(buffer);
+        vfree(buffer);
         return user_len;
 out_parse_error:
         rc = -EINVAL;
         pr_warning("%s is not a supported value for /proc/dasd/statistics\n",
                 str);
 out_error:
-        kfree(buffer);
+        vfree(buffer);
         return rc;
 #else
         pr_warning("/proc/dasd/statistics: is not activated in this kernel\n");
diff --git a/drivers/s390/char/sclp_async.c b/drivers/s390/char/sclp_async.c
index 7ad30e72f868..5f9f929e891c 100644
--- a/drivers/s390/char/sclp_async.c
+++ b/drivers/s390/char/sclp_async.c
@@ -82,12 +82,9 @@ static int proc_handler_callhome(struct ctl_table *ctl, int write,
                         return -EFAULT;
         } else {
                 len = *count;
-                rc = copy_from_user(buf, buffer, sizeof(buf));
-                if (rc != 0)
-                        return -EFAULT;
-                buf[sizeof(buf) - 1] = '\0';
-                if (strict_strtoul(buf, 0, &val) != 0)
-                        return -EINVAL;
+                rc = kstrtoul_from_user(buffer, len, 0, &val);
+                if (rc)
+                        return rc;
                 if (val != 0 && val != 1)
                         return -EINVAL;
                 callhome_enabled = val;
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 7bc643f3f5ab..e5c966462c5a 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -14,6 +14,8 @@
 #include "chsc.h"
 
 #define QDIO_BUSY_BIT_PATIENCE          (100 << 12)     /* 100 microseconds */
+#define QDIO_BUSY_BIT_RETRY_DELAY       10              /* 10 milliseconds */
+#define QDIO_BUSY_BIT_RETRIES           1000            /* = 10s retry time */
 #define QDIO_INPUT_THRESHOLD            (500 << 12)     /* 500 microseconds */
 
 /*
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index f8b03a636e49..0e615cb912d0 100644
--- a/drivers/s390/cio/qdio_debug.c
+++ b/drivers/s390/cio/qdio_debug.c
@@ -188,19 +188,13 @@ static ssize_t qperf_seq_write(struct file *file, const char __user *ubuf,
         struct qdio_irq *irq_ptr = seq->private;
         struct qdio_q *q;
         unsigned long val;
-        char buf[8];
         int ret, i;
 
         if (!irq_ptr)
                 return 0;
-        if (count >= sizeof(buf))
-                return -EINVAL;
-        if (copy_from_user(&buf, ubuf, count))
-                return -EFAULT;
-        buf[count] = 0;
-
-        ret = strict_strtoul(buf, 10, &val);
-        if (ret < 0)
+
+        ret = kstrtoul_from_user(ubuf, count, 10, &val);
+        if (ret)
                 return ret;
 
         switch (val) {
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index e58169c32474..288c9140290e 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -313,7 +313,7 @@ static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit)
         unsigned long schid = *((u32 *) &q->irq_ptr->schid);
         unsigned int fc = QDIO_SIGA_WRITE;
         u64 start_time = 0;
-        int cc;
+        int retries = 0, cc;
 
         if (is_qebsm(q)) {
                 schid = q->irq_ptr->sch_token;
@@ -325,6 +325,7 @@ again:
         /* hipersocket busy condition */
         if (unlikely(*busy_bit)) {
                 WARN_ON(queue_type(q) != QDIO_IQDIO_QFMT || cc != 2);
+                retries++;
 
                 if (!start_time) {
                         start_time = get_clock();
@@ -333,6 +334,11 @@ again:
                 if ((get_clock() - start_time) < QDIO_BUSY_BIT_PATIENCE)
                         goto again;
         }
+        if (retries) {
+                DBF_DEV_EVENT(DBF_WARN, q->irq_ptr,
+                              "%4x cc2 BB1:%1d", SCH_NO(q), q->nr);
+                DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "count:%u", retries);
+        }
         return cc;
 }
 
@@ -728,13 +734,14 @@ static inline int qdio_outbound_q_moved(struct qdio_q *q)
 
 static int qdio_kick_outbound_q(struct qdio_q *q)
 {
+        int retries = 0, cc;
         unsigned int busy_bit;
-        int cc;
 
         if (!need_siga_out(q))
                 return 0;
 
         DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w:%1d", q->nr);
+retry:
         qperf_inc(q, siga_write);
 
         cc = qdio_siga_output(q, &busy_bit);
@@ -743,7 +750,11 @@ static int qdio_kick_outbound_q(struct qdio_q *q)
                 break;
         case 2:
                 if (busy_bit) {
-                        DBF_ERROR("%4x cc2 REP:%1d", SCH_NO(q), q->nr);
+                        while (++retries < QDIO_BUSY_BIT_RETRIES) {
+                                mdelay(QDIO_BUSY_BIT_RETRY_DELAY);
+                                goto retry;
+                        }
+                        DBF_ERROR("%4x cc2 BBC:%1d", SCH_NO(q), q->nr);
                         cc |= QDIO_ERROR_SIGA_BUSY;
                 } else
                         DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w cc2:%1d", q->nr);
@@ -753,6 +764,10 @@ static int qdio_kick_outbound_q(struct qdio_q *q)
                 DBF_ERROR("%4x SIGA-W:%1d", SCH_NO(q), cc);
                 break;
         }
+        if (retries) {
+                DBF_ERROR("%4x cc2 BB2:%1d", SCH_NO(q), q->nr);
+                DBF_ERROR("count:%u", retries);
+        }
         return cc;
 }